Installation
2.
FLEXIBLE COUPLED PUMPS
CLOSE COUPLED PUMPS
A.
Location
B.
Foundation
C.
Leveling
D.
Alignment
E.
Piping
F.
Typical Installation
In order to insure that pumping equip-
ment is installed properly and to
obtain reliable pump operation, it is
recommended that only experienced,
qualified erecting engineers under
-
take this task. Read the instructions
thoroughly before beginning.
2A Location
The first consideration for locating
a pump is elevation. The lowest
possible elevation using the shortest
possible suction piping is usually the
best. Questions regarding possible
locations should be resolved by mak-
ing inlet head calculations including
all friction losses. The one producing
the highest inlet pressure should be
selected. One reason for this pre-
caution is that, the greater the inlet
pressure, the less likelihood of NPSH
problems. Also a flooded suction is
particularly helpful on start-up when
the seals or the entire pump can
be ruined because it is not properly
primed and purged of air.
A dry, easily accessible location is
also important. Allow ample clear-
ance around the unit for free air
circulation. If a dry location is not
available, the pump can be mounted
on a foundation, above the floor.
Specify motor enclosure, pump ma-
terials, or coatings to suit the worst
conditions expected. Place the pump
so that it can be easily inspected and
serviced during operation. Sufficient
head room should be provided, par-
ticularly when lifting devices will be
used for heavier assemblies.
2B Foundation
Baseplates alone are not rigid
enough to maintain alignment of
the unit. The pump foundation is
used as a support for the baseplate
to maintain alignment of the unit. If
the baseplate is to be grouted to the
foundation, it is only necessary to
embed the edges. It is unnecessary
to completely fill under the baseplate.
DO NOT grout the unit to the founda-
tion until it has been properly aligned.
The foundation must be a perma-
nent rigid installation of concrete or
other material of sufficient mass to
absorb all normal vibrations. Locate
the foundation bolts using a layout
or template in relation to the suction
and discharge piping. If concrete is
being used, foundation bolts of the
specified size can be enclosed in a
pipe sleeve two to three diameters
larger than the bolts to compensate
for minor variations in alignment.
Close coupled pumps can be mount-
ed on a steel base prior to installation
or mounted directly to the foundation.
Place shims under one or more of the
motor feet so that strain and distor-
tion will not result when the mounting
bolts are tightened.
2C Leveling (Flexible Coupled
Pumps Only, Refer to Figure 2-1)
If the unit is received with the pump
and motor mounted on the baseplate:
1. Place the unit in position.
Foundation
Figure 2-2
1/4”
Finished Grouting
3/4” to 1 1/2”
Allowance for
Grout
Dam
Baseplate
Grout
Leveling Wedges or Shims - Left in Place
Pipe Sleeve
Washer
Lug
Top of
Foundation Left
Rough - Clean
and Wet Down
Figure 2-1
2. Disconnect the coupling halves.
Do not reconnect until all align-
ment procedures have been
completed.
3. Support the baseplate on metal
shims or wedges having a small
taper. (Refer to Figure 2-2)
a. Place shims close to the foun-
dation bolts. (Refer to Figure
2-3)
Section
T51 • E51
Page 504
Dated
February 2014
T51 • E51 SERIES
Figure 2-3
b. Also place shims close to
where the greatest weight is
located.
4. Check the baseplate for distortion:
a. Place a straightedge along the
baseplate to determine if it is
distorted.
b. Adjust the shims until the base-
plate is not distorted.
5. Use a section of pipe to determine
if the inlet and discharge openings
are vertical and located properly.
6. Correct the positions, if necessary,
by adjusting the shims.
2D Alignment
Although flexible coupled pumps are
carefully aligned prior to crating and
shipping, it is very likely that strains
imposed during transit have altered
the alignment. Complete the fol-
lowing steps after the unit has been
placed on the foundation and leveled.
